6-m/10-Gbps underwater wireless red-light laser transmission system

Abstract

Abstract. An underwater wireless red-light laser transmission system using 10-Gbps 16-quadrature amplitude modulation-orthogonal frequency-division multiplexing (OFDM) modulation based on a high-speed multimode 680-nm vertical-cavity surface-emitting laser (VCSEL) was proposed and demonstrated. This study is the first attempt to adopt red light for transmitting a 10-Gbps wireless signal 6-m underwater. With the adoption of the appropriate OFDM base bandwidth and modulation parameters after studying the frequency characteristics of the high speed multimode 680-nm VCSEL and contrast experiment of modulation parameters, a good bit error rate performance and clear constellation maps are achieved.

Year in Review

“…8 The two regular papers in the top-ten list included a theoretical paper describing a momentum exchange theory for photon diffraction that uses momentum transfer probability distributions as an alternative to classical wave theory, 9 and an applied paper on an underwater laser communications system based on a 680 nm vertical external cavity surface emitting (VECSEL) laser to achieve wider bandwidth than more prevalent blue-green laser systems. 10 While citation statistics at the end of the publication year are not very reliable, they do indicate some of the potentially most impactful papers. Three of the top ten were published in the light-field and holographic display special section: the paper related to holographic wavefront printing, 1 a paper detailing an active matrix spatial light modulator for holographic display, 11 and another 3-D display paper exploring the use of multiple projectors to enhance the viewing zones.…”

High-Speed Underwater Optical Wireless Communication with Advanced Signal Processing Methods Survey

“…However, the PPM suffers from the disadvantage of low spectral efficiency. To achieve a high data rate transmission, more advanced signal modulation methods, such as multi-level pulse amplitude modulation (PAM) [27,35,[48][49][50] and quadrature amplitude modulation (QAM) [51][52][53][54][55], have been applied in recent studies. PAM uses multiple power levels to modulate information, and hence, provides higher spectral efficiency.…”

Adaptive and secure VCSEL FSO based on simple dual-polarized architecture for short distance transmission

“…To balance the insignificance rate of wireless network, the optical wireless communication (OWC) techniques are alternative selection [5][6][7][8][9]. Therefore, the visible light communication (VLC) and free space optical (FSO) communication methods would bring many potential benefits for wireless access, such as less interference, widely data capacity, powerefficient, less mass, license-free, no electromagnetic interference (EMI), and cost-effective [10][11][12].…”